12 Questions
Which amino acid is tyrosine derived from?
Phenylalanine
Which gland secretes the hormone triiodothyronine (T3)?
Thyroid gland
Which hormone is derived from tryptophan?
Norepinephrine (NE)
Which of the following hormones is derived from tyrosine and is too large and polar to pass through the cell membrane?
Thyroxine (T4)
Why are NE and Epi considered water-soluble hormones?
They are large and polar, preventing them from passing through cell membranes.
Which hormone secreted by the adrenal medulla is derived from tyrosine and is water-soluble?
Epinephrine (Epi)
Which of the following hormones is derived from tyrosine and is small and non-polar?
Triiodothyronine (T3)
Which amino acid can be used to produce hormones that are too large and polar to pass through the cell membrane?
Tyrosine
The hormone derived from tryptophan is water-soluble.
False
Hormones derived from tyrosine are generally small and non-polar.
False
Adrenal medulla secretes hormones that are small and non-polar.
False
Thyroid gland secretes hormones that are too large and polar to pass through the cell membrane.
True
Study Notes
Amino Acid Derivatives
- Tyrosine is the amino acid from which triiodothyronine (T3) and other hormones are derived.
- Tryptophan is the amino acid from which a hormone is derived.
Hormone Characteristics
- Hormones derived from tyrosine are generally small and non-polar.
- Hormones derived from tryptophan are water-soluble.
- Norepinephrine (NE) and Epinephrine (Epi) are water-soluble hormones.
Gland Secretions
- The thyroid gland secretes triiodothyronine (T3), which is too large and polar to pass through the cell membrane.
- The adrenal medulla secretes hormones derived from tyrosine, which are small and non-polar.
Hormone Properties
- Hormones derived from tyrosine can be too large and polar to pass through the cell membrane.
- Hormones derived from tyrosine can also be small and non-polar.
Test your knowledge about amine hormones derived from the amino acids tyrosine and tryptophan, including hormones secreted by the adrenal medulla and the thyroid gland. Learn about water-soluble and small, non-polar hormones.
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